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Explain the advantage of the increase in the rate of blood flow to heart muscle during exercise?

Explain the link between atheroma and the increased risk of aneurism?

Explain what causes the blood pressure in the aorta to be higher than in the pulmonary artery?

Explain the meaning of the term atheroma

Explain why atheroma may lead to a blood clot.

Suggest two ways in which prolonged high blood pressure may affect the arteries.

The sinoatrial node (SAN) is in the right atrium of the heart. Describe the role of the sinoatrial node.